Siemens Sinumerik 840DiE sl - Page 371

01/2007
11.5 Axes and spindles
11-371
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) -- 01/2007 Edition
MD31020 * pulse rev.
360 degrees
MD31070
MD31080
**
MD10210
*
MD31060
MD31050
Internal
resolution
=
500 * 128
360
1
**
1000
1
1
*
1
= 5.625
Internal
resolution
=
int. increments
encoder pulse
One encoder increment corresponds to 5.625 internal increments.
One encoder increment corresponds to 0.005625 degrees (highest possible
positioning resolution).
Suppose the following conditions are provided:
S The incremental encoder is mounted on the motor.
S Encoder pulses = 2048 [pulses/rev.]
S Pulse multiplication = 128
S Internal precision = 1000 [increment/degree]
S Encoder gear stage = 1:1
S Load gear stage 1= 2.5:1 [motor rev./spindle rev.]
S Load gear stage 2= 1:1 [motor rev./spindle rev.]
Gear stage 1
MD31020 * pulse rev.
360 degrees
MD31070
MD31080
**
MD10210
*
MD31060
MD31050
Internal
resolution
=
2048 * 128
360
1
**
1000
1
1
*
2.5
= 0.54932
Internal
resolution
=
int. increments
encoder pulse
One encoder increment corresponds to 0.54932 internal increments.
One encoder increment corresponds to 0.00054932 degrees (highest possible
positioning resolution).
Gear stage 2
2048 * 128
360
1
**
1000
1
1
*
1
= 1.3733
Internal
resolution
=
int. increments
encoder pulse
One encoder increment corresponds to 1.3733 internal increments.
An encoder increment corresponds to 0.0013733 degrees (highest possible
positioning resolution).
Example B:
encoder at motor
11
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